11
3 Product description
MINITRAC 31 • Foundation Fieldbus
41782-EN-211203
TheelectronicsmodulecanonlybeexchangedbyVEGAservice
technician.
The supplementary electronics module PROTRAC.ZE… is a replace-
ment part for radiometric sensors MINITRAC 31.
It is located in the lateral adjustment and connection compartment.
Brackets and special mounting accessories are available for mount-
ing the MINITRAC 31.
For mounting on pipelines, there are corresponding clamp brackets.
Contactoursalessta.
Theradiometricsensorhastemperaturelimitswhichmustnotbe
exceeded. In case the max. permissible temperature is exceeded,
faulty measurements and a permanent damage of the sensor can be
caused.
You have several possibilities to avoid too high ambient temperatures:
Passive sun shade
Direct sun increases the temperature on the sensor by 20 °K. The
bestpossibilitytoprotectthesensoragainsttheeectsofdirectsun
is a suitable roof structure.
Ifthisisnotpossibleoronlywithgreateort,thenyoucanusethe
passive sun shade. The passive sun shade consists of a housing sun
shade and a sun protection hose and can reduce the sensor tempera-
ture by 10 °K.
Air cooling
For ambient temperatures up to +80 °C you can use an air cooling.
Thecoolingairisgeneratedwithvortexcoolers.Pleasecheckifsuf-
cientcompressedairisavailable.Youcanndfurtherinformation
in the supplementary instructions of the air cooling. The air cooling
cannotberetrotted.
Water cooling
Forambienttemperaturesupto+100°Cyoucanuseawatercool-
ing.Pleasecheckifsucientcooledwaterisavailable.Youcannd
furtherinformationinthesupplementaryinstructionsofthewater
cooling.Thewatercoolingcannotberetrotted.
In order to exclude external interference radiation, you can mount a
gammamodulatorinfrontofthesourceholder.Thisallowsreliable
measurementevenwheninterferenceradiationoccurs.
Supplementary electron-
ics module - PROTRAC.
ZE
Mounting accessories
Device cooling
Gamma modulator